/**
 * Copyright (C) 2002-2015   The FreeCol Team
 * <p>
 * This file is part of FreeCol.
 * <p>
 * FreeCol is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 * <p>
 * FreeCol is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * <p>
 * You should have received a copy of the GNU General Public License
 * along with FreeCol.  If not, see <http://www.gnu.org/licenses/>.
 */

package net.sf.freecol.server.model;

import java.util.logging.Logger;

import net.sf.freecol.common.model.DiplomaticTrade;
import net.sf.freecol.common.model.Settlement;
import net.sf.freecol.common.model.Unit;
import net.sf.freecol.server.control.ChangeSet;
import net.sf.freecol.server.control.ChangeSet.See;


/**
 * A type of session to handle diplomacy.
 */
public class DiplomacySession extends TransactionSession
{

    private static final Logger logger = Logger.getLogger( DiplomacySession.class.getName( ) );

    /** The agreement under consideration. */
    private DiplomaticTrade agreement;

    /** The initiating unit. */
    private final Unit unit;

    /** The other player's settlement. */
    private final Settlement settlement;

    /** The other player's unit (only non-null in first contact cases). */
    private final Unit otherUnit;


    public DiplomacySession( Unit unit, Settlement settlement )
    {
        super( makeSessionKey( DiplomacySession.class, unit, settlement ) );
        this.agreement = null;
        this.unit = unit;
        this.settlement = settlement;
        this.otherUnit = null;
    }

    public DiplomacySession( Unit unit, Unit otherUnit )
    {
        super( makeSessionKey( DiplomacySession.class, unit, otherUnit ) );
        this.agreement = null;
        this.unit = unit;
        this.settlement = null;
        this.otherUnit = otherUnit;
    }

    @Override
    public void complete( ChangeSet cs )
    {
        unit.setMovesLeft( 0 );
        cs.add( See.only( ( ServerPlayer ) unit.getOwner( ) ), unit );
        super.complete( cs );
    }

    public DiplomaticTrade getAgreement( )
    {
        return agreement;
    }

    public void setAgreement( DiplomaticTrade agreement )
    {
        this.agreement = agreement;
    }

    public Unit getUnit( )
    {
        return unit;
    }

    public Settlement getSettlement( )
    {
        return settlement;
    }

    public Unit getOtherUnit( )
    {
        return otherUnit;
    }
}
